Having read Peter Pan this year, I thought you might be interested in this story from the How Books Got Their Titles blog :
It is well known that Peter Pan was named after Peter Llewellyn-Davies, one of the five sons of Arthur and Sylvia Llewellyn-Davies, friends of Barrie’s and the models for Mr and Mrs Darling: ‘Pan’ came from the Greek god. What is perhaps less well known is that Peter Llewellyn-Davies was named after another fictional character, Peter Ibbetson, the eponymous hero of George Du Maurier’s popular novel of 1891 (Du Maurier was Peter’s grandfather). Peter, then, was sandwiched between two well-known fictional creations, a burden for later life to rival Christopher Robin Milne’s (the original of Winnie-the-Pooh’s Christopher Robin) or Alice Liddell’s (of Alice’s Adventures in Wonderland). He threw himself under a train in 1960: by then he had survived the Somme and the violent deaths of two of his brothers, and so had plenty of reasons for his fragile mental state — but the papers still insisted on reporting it as ‘Peter Pan’s Death Leap’.
Birkin, Andrew: J. M. Barrie & the Lost Boys (1979)